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The science of tree rings--"dendroclimatology"--had not been developed when John Wesley Powell made his epic voyages down the Colorado River in 1869, 1871, and 1872. Nevertheless he observed that the rising and falling of the river differed over the years and came to understand the important role these variations played in the lives of people trying to live in the West. While Powell was braving the Colorado River's rapids, a tree in southwestern Colorado was putting on rings. In 1869 it was a modest ring. In 1871, the year Powell returned to begin his second trip, the ring was remarkably thin. In 1872, as the river rose to levels that made it almost impassable, the tree's ring was fat. We know this because, over a century later, paleoclimatologist Connie Woodhouse has studied that tree and many others in the Four Corners region, using the fat and thin rings to estimate how much water has flowed down the Colorado River each year for the past millennium. The Tree Rings' Tale addresses one of the most important guiding principles for life in the arid West and one that scientists have long recognized: climate variability. Combining classic climatology with oceanography, meteorology, geology, archaeology, and even a touch of astronomy, this exploration offers young scientists a chance to unravel how, over the past 150 years, we have come to learn more about the natural world. Activities included after each chapter provide hands-on experience with some of the very processes scientists use to understand how our world works. Ages 13 and up

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书籍介绍

The science of tree rings--"dendroclimatology"--had not been developed when John Wesley Powell made his epic voyages down the Colorado River in 1869, 1871, and 1872. Nevertheless he observed that the rising and falling of the river differed over the years and came to understand the important role these variations played in the lives of people trying to live in the West. While Powell was braving the Colorado River's rapids, a tree in southwestern Colorado was putting on rings. In 1869 it was a modest ring. In 1871, the year Powell returned to begin his second trip, the ring was remarkably thin. In 1872, as the river rose to levels that made it almost impassable, the tree's ring was fat. We know this because, over a century later, paleoclimatologist Connie Woodhouse has studied that tree and many others in the Four Corners region, using the fat and thin rings to estimate how much water has flowed down the Colorado River each year for the past millennium. The Tree Rings' Tale addresses one of the most important guiding principles for life in the arid West and one that scientists have long recognized: climate variability. Combining classic climatology with oceanography, meteorology, geology, archaeology, and even a touch of astronomy, this exploration offers young scientists a chance to unravel how, over the past 150 years, we have come to learn more about the natural world. Activities included after each chapter provide hands-on experience with some of the very processes scientists use to understand how our world works. Ages 13 and up

• 作者：七锡地 发布时间：2017-06-30 00:24:00

  这本书是卡内基训练授权中信出版社出版的《How to win friends and influence people》最新中文版本。书的封面更显商务，书版面比上一版本大了一些，看书时更容易固定在某一页上。内容仍是经典的！值得拥有！

• 作者：塔卡纳马塔塔 发布时间：2011-10-08 01:54:28

  这本还在

• 作者：哀綠綺絲 发布时间：2021-01-22 20:52:09

  文如其名地簡明，沒有門檻，想要尋求進階指南的讀者大概會失望。對我來說，最有用的是第二、三章。至於內容，如果不打算研究英美法，大概用處不大？介紹引用格式的地方，讀原版可能幫助更大。

• 作者：AngeIa Z 发布时间：2022-11-11 17:22:36

  系统了解人本主义的专业书籍！书不厚，精炼集合。

• 作者：新橋 发布时间：2013-03-31 20:02:20

  终于啃完了。前言写得很不错，对人物、地名、官制、年代以至诏书文字及其典故名物等皆有详细的考订，是长编考异之法的成功之作，亦可表见新知创获，惟似稍疏于礼制，些许小疵，无伤大雅。

• 作者：lorigh 发布时间：2023-07-02 15:28:19

  以前阅看了一部朱自清的散文选，我当时的感觉是不有趣的，所以现在挺不起来兴趣。

• 《选对保险避开坑》笔记

  作者：Sk·Tj 发布时间：2024-02-24 19:31:03

  1.家庭保险规划中，人寿险、重大疾病保险、意外险三种险是基石。

  2.远离两全险；

  3.人寿险给家庭只需家庭收入方购买。

  4.人寿险一般保额30万的费用在1000-2000区间。

  5.不要买终身人寿险，一般买到60岁就行。

  6.有消费型、返还型、理财型三种人寿险，如果触发保险，消费型最有性价比，跟余额宝年化率对比，返还型、理财型保险的收益率非常低，很不划算。

  7.人寿险支出可以考虑每年2000以内。

  8.重疾险有给付型（保多少付多少）、补偿型（花多少补多少）、津贴型（每天补点津贴等）。

  9.重疾的费用一般在10-30万甚至更多。

  10.百万医疗险代替不了重疾险，百万医疗险无法长期续保，一般期限在七年内，而身体健康的人一般6、7年内换重疾的可能性低，而且百万医疗险的免赔额非常高，所以百万医疗险是个坑。

  10.重疾险买覆盖25种重疾就行了，也可以买前6种重疾，数量大了没什么用。

  11.儿童投保白血病险一般在1000以内。

  12.因为CPI上升的原因，不建议投保终身险，重疾险买20-30年的，保费高于35万的，一般年费2000-5000。

  13.如果非要省钱，重疾险可以替换成防癌险。

  14.保险公司只能在合同生效两年内解除合同。

  15.保险费用不建议超过家庭年收入10%。

  16.可以每年买个200以内的意外险

• 不要等到失去才懂得

  作者：Shirjis+Fire 发布时间：2010-12-30 14:08:35

  这本书非常非常薄，几小时就读完了。故事表现着主人公旺达对每一位同学的爱。其实，如果认真地去发现生活的点点滴滴，你会觉得非常的幸福，因为你会看到很多很多人都在爱你，那种爱另人难舍。